Casper l



c. L; REDPIEL TYPE ma PQR MATRIX M Nq. I N pfjzr-657'4Q. vPads-@Mad Deolv.; 10,; 1889;.,

(No Model.)

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` UNITED STATES PATENT Ormea? CASPER L. REDEIELD, or MINNEAPOLIS,MINNESOTA, ASsIeNoR, BY` MESNE ASSIGNMENTS, To THE CHICAGO IvIATRIX MACHINE COMPANY.

TYPE- DIE FO R MATRIX-.MAKI NG.

SPECIFICATION forming part of Letters Patent No. 416,740, dated December 1Q, 1.889.`

Appiication nea March' 2, 1889. serial No. 301,744. (No model.) y

To all whom it may Concern; around the hair-lines back ofthe face of the 4 Be it known that I, CASPER L. REDFIELD, die and in the portion that penetrates the a citizen of the United States, residing at matrix-body. These shoulders have the ef- Minneapolis, in the county of Hennepin and fect of Widening the main body of the. im- 55. 5 State of Minnesota, have invented certain pression without disturbing the face portion new and useful Improvements iin Type-Dies and effect three important results-first, a for Matrix-Making; and I do hereby declare. sufficient Width of impression near the face that the following is a full, clear, and exact is-made to avoid cold-short in casting; secdescription of the same, reference beinghad ond, that portion of the'` matrix-body which 6o Io to the accompanying drawings; the next die would be likely to crowd over My invention relates to type-dies used for into the precedingimpression is removed, and, making impressions in a matrix-body, from third, the matrix-body is hardened and solidi-y` Y which stereotype-plates may be cast to be tied around the face of the letter and renders used for printing, and more particularl5T to any swell or spring in the matrix-body less 65 the dies used in matrix-making machines liable to distort or injure the impression.4 that formfthe impressions by the successive These results are best accomplished by mak-` operation of single dies. ing the shoulder on the forward edgefthat The objects of the invention are, first, so is, the edge next to which the following imconstructing the dies that the .impression pression comes-somewhat wider and nearer 7oi zo made by one die will not be injured by the the face of the letter than the shoulderlat impression made bythe next succeeding die, the rear edge. The-reason of this is that and, second, that the faces of the dies will the purpose of the shoulder `on the rear` make sharp outlines to the characters imedge of the letter is onlyto widen thegenpressed, so that the stereotype-plates cast eral impression, while that on the front 75. 25 from the matrices will give cleancut and `edge has not only to Widen the body ofthe clear prints. impression, but to clearthe `Way so that the In making matrices by the use of ordinary next die will not injure its face. As the rear type-dies that are successively impressed in shoulder of a second letter strikes nearor` the matrix-body it is found that frequently over the front edge of the V4.first impression, 8o 3o Where the impressions are close together the the result is thatwhatever vbulkof ,matrix die last operated crowds material from the material is crowded over has a space into matrix-body into `the impression next prewhich it can go without injury to theface of ceding, solas to form a defective matrix the imprint. On such letters as donot have and render it impossible to cast therefrom hair-lines coming next to the succeeding im- 85 3 5 a stereotype plate With letters and charpression, as M and e, for instance, the shoulvacters all perfect. The impressions, to enders may be alike on both sides. In a series able a suitable stereotype-plate to be formed, of letters, large and small, the width and must have a considerable depth inthe ma- Aamount of shoulder for the small letters trix body as compared with the size of should be proportionately larger than on the- 9d 4o the face of the characters themselves, and large letters. This not only reduces the liain using dies as ordinarily constructed the bility of the large letters injuring the smaller portions of the letters constituting the hairones, but makes the resistance of the matrixlines form Such narrow impressions that in body oifered to letters of different sizes more casting from the matrix cold-short occurs nearly equal, and renders it less difficult to 95 45 and the plate is rendered defective. This insure an equal depth of impression for all difficulty is aggravated Where 'a hair-line is letters, whether large or small. immediately followed by a Wide stem of the In using ordinary type-dies having their next letter, for some of the matrix-body is faces fiat it is frequently foundthat the Inat-` liable to be crowded over into the'former imrices formed therefrom `will not have clearrop 5`o pression, making it still narrower. I overcut and well-defined characters in the m,

come these difficulties by forming shoulders pressions, because, first, the innercorners d tend to draw up, and, second, the continued use of the dies tends to wear oft' the edges forming the outlines of the letters, and the resiliency of the matrixmaterial tends to increase the defect. This difficulty is obviated by making the faces of the dies slightly concavein cross-section.

In the accompanying drawings, the word Milo, shown in Figure l, is selected for illustrating my improvements. Fig. 2 showsa vertical section of a matrix, in which the letters M-i-l have been impressed; and Fig. 3, a sectional View of a die 4in position to iinpress the letter o in the matrix, lthe pro-V posed impression being shown by dotted lines. The impressions shown in Fig. 2 are such as are desired to be made by diescut in the ordinary manner, andare assumedto be approximately perfect. Fig. 4 shows in, a like sectionall view of the matrix the'distortionof material that` experience teaches is 'likely to occur; and Fig. 5, a section 'of the matrix on the line Y Y, showing a probable distortionand displacement of the matrix material about the feet of the letters. Fig. 6 is lasection von the same planeas Fig. 2 of a matrix in which Aare impressed the letters M-l, and showing a vertical section .of the:

head of the die for forming .the letter 0, as the 'same, would be formed Aby theuse of my improvements.l Fig. 7 shows the letters Ms l and theirshoulders as they would appear on the matrix. Fig. 8 `shows a central transversesection of the'die for theletter ffl.

Fig. 9 is a plan View oftheV matrix, showing only the letters i-lg and Fig. l0 is a seo: tional view of the same on the line z e of Fig. 9,`showinga portion of the die for the letter l. in position to descend; Fig. 1l, the facey of the die for the letter e, Fig. l2, the matriximpression produced thereby; and Fig. l3 isa vertical. section of a die for,- the letter o,7 showing the concave form of face.

f In said drawings, l indicates amatrix-body, and l2 the bodies-of theptype-dies. These are shown on a, scale enlarged many times loeyond the sizes used in ordinary printing, for the purpose of more clearly illustrating the improvements. The letters of the selected word Milo are indicated on the dies and inatrices by. the `corresponding letters M -i-l-o. The portion 3 of the die that projects from thefdie-body on which the letter is cut and which penetrates the matrix material has shoulders 4 and 5, that form corresponding shoulders inthe matrix. The shoulders 4 are those of less width and farther from the faces of the letters. The shoulders 5 are those of the ,greater width and closer to the faces of the letters. The foij'merare provided at .the left sides of narrow stemsthat will occupy advance positions on t-he matrix and at bothsides of such lines as are in rear of .such

position as the ,two thinner lines of the letter M. The latter (the shoulders 5) are provided at the right or outer sides of narrow stems occupying the advance position, as shown in theletter l in Fig. 7, and i-li" in Fig. 9, so that, as one letter is impressed its narrower and shallower shoulder will adjoin the wider and deeper shoulder of the last preceding impression. Thus, as more clearly shown in Figs. 9 and 10, the wider and deeper shoulder 5 ofthe letter i is voverlapped' at the foot shoulder 4 of the die to crowdmaterial over lto the left to some extent without injuryto the facel of the preceding die-impression.

The impressions are vthus somewhat widened back of the face.` The `r'natrix material thereabout is iirr'nlyimpactedand spaces of suflif cient width-produced to in'snre perfect lletters on the stereotype-plates cast from such matrices. I`The shoulders4and5 are .made pro portionately larger for small than large letters..` i .e f,

A .sharpoutline may r be given the. v face', of the impressions inthe matrix v by.making the faces ofthe letters on the dies slightly concave between the sides, as illustrated at 7 in Fig.

What I claim is- 1. A type-die having its hair-lines protected by' ashoulder, substantially las set forth.

2. A type-diehavingshoulders on the frontandrear. edgesfthe former being nearer the face thanthe latter, substantially asset forth. 3. A type-die having shoulders'onthe front and -rear edges, the former being wider than the latter, substantially as set forth.,

4. A type-die having shoulders on the fron't andrear edges, theformer being wider and nearer the face than the latter, substantially as set forth.

5., Type-dies for matrix-making, provided.

with shouldersnear their faces, the shoulders forthe smaller dies being proportionately larger than for the larger dies, for the purpose set forth. Y e.

6. A type-die having the stem or stems of the vcharacter on its face transversely concave. .f

7. A type-dic for matrix-makingfhaving shouldersvarying in width andI4 distance from the face, for the purposeset forth.y

S. Av type-die Yfor matrix-making, having shoulders varying in width and distance from the face. and having the stem or stems of the character on the face concave in crosssection, substantially as set forth.

cAsPR L. Reprints. In presence off-A P. H GUNCKEL, J. L. DOBBIN. Y

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